I've never noticed any aggresion from them. I did have two females and a male, one of the females died about a month ago. I believe she died of old age tho.
Male and female.
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Full tank.
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They are just bettas from Wal-Mart tho, nothing special I just liked how they looked and wanted something for the top water. In my experience if you have fish that are always out on the top, tush swimming mud water as well, a lot of my fish that usually hide or sit in the bottom become more active. And with the heat, my tank is usually in the 78-80 degree range.
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they look so happy not like mine. and man, your water's quiet warm.
i wanted to put my betta in my bigger tanks but gosh, their all predatory fish and the current is quiet strong.